Android phone phablet 4g smartphone dual sim phone series zte axon display size 52 inch display resolution 1920 x 1080 pixels display resolution full hd display type amoled touchscreen multitouch capacitive display characteristics curved display display properties scratch resistant display material gorilla glass 4 pixel density 424 ppi ram 3 gb internal memory gb 32 gb max memory expansion 128 gb processor manufacturer qualcomm processor type